Problem in racing games with mouse

If i map mouse_xasis in input steering to choose circuit or car in racing games, when the race starts the car goes to the left or to the right depending the direction i took in the circuit and car selection screens.
I think that with an autocenter setting for the mouse, this wouldn't happen.
P.S.:My gamepad isn't analogic.
I think that with an autocenter setting for the mouse, this wouldn't happen.
P.S.:My gamepad isn't analogic.